// Define custom variables
var currentTwit = 0;
var maxTwit = 5;
var timeRotationTwit = 12000;
var myTwits;
var myTwitInterval;

// Callback from twitter
function twitterCallback2(twitters) {
 myTwits = twitters;
 DisplayTwits();
 myTwitInterval = window.setInterval("nextTwit()",timeRotationTwit);
}

// Display twit
function DisplayTwits() {
  var statusHTML = [];
  var username = myTwits[currentTwit].user.screen_name;
  var status = myTwits[currentTwit].text.replace(/((https?|s?ftp|ssh)\:\/\/[^"\s\<\>]*[^.,;'">\:\s\<\>\)\]\!])/g, function(url) {
    return '<a href="'+url+'">'+url+'</a>';
    }).replace(/\B@([_a-z0-9]+)/ig, function(reply) {
    return  reply.charAt(0)+'<a href="http://twitter.com/'+reply.substring(1)+'">'+reply.substring(1)+'</a>';
    });
  statusHTML.push('<li><span>'+status+'</span> <a href="http://twitter.com/'+username+'/statuses/'+myTwits[currentTwit].id+'"><br>'+relative_time(myTwits[currentTwit].created_at)+'</a><br><br></li>');
  document.getElementById('twitter_update_list').innerHTML = statusHTML.join('');
}

function nextTwit() {
	currentTwit++;
	if(currentTwit==maxTwit) currentTwit = 0;
	DisplayTwits();
}

function previousTwit() {
  	currentTwit--;
	if(currentTwit<0) currentTwit = (maxTwit-1);
	DisplayTwits();
}

function changeTwit(bDirection){
  clearInterval(myTwitInterval);
  if(bDirection) nextTwit(); else previousTwit();
}

function relative_time(time_value) {
  var values = time_value.split(" ");
  time_value = values[1] + " " + values[2] + ", " + values[5] + " " + values[3];
  var parsed_date = Date.parse(time_value);
  var relative_to = (arguments.length > 1) ? arguments[1] : new Date();
  var delta = parseInt((relative_to.getTime() - parsed_date) / 1000);
  delta = delta + (relative_to.getTimezoneOffset() * 60);

  if (delta < 60) {
    return 'less than a minute ago';
  } else if(delta < 120) {
    return 'about a minute ago';
  } else if(delta < (60*60)) {
    return (parseInt(delta / 60)).toString() + ' minutes ago';
  } else if(delta < (120*60)) {
    return 'about an hour ago';
  } else if(delta < (24*60*60)) {
    return 'about ' + (parseInt(delta / 3600)).toString() + ' hours ago';
  } else if(delta < (48*60*60)) {
    return '1 day ago';
  } else {
    return (parseInt(delta / 86400)).toString() + ' days ago';
  }
}